Igcse Model Questions Vol1 2023 Chemistry Question 16
Practice objective / multiple choice question 16 from the 2023 Igcse Model Questions Vol1 Chemistry examination.
A water treatment plant processes 5000 L of river water that contains 0.12 mg L^{-1} of phosphate ions (\(\text{PO}_4^{3-}\)). To remove the phosphate, 2.0 g of calcium hydroxide, Ca(OH)_{2}, is added and the mixture is allowed to reach equilibrium at 25 °C. The solubility product of calcium phosphate, Ca_{3}(PO_{4})_{2}, is \(K_{sp}=2.07\times10^{-33}\). Calculate the final concentration of phosphate ions in the water, expressed in mg L^{-1}, after precipitation has taken place.
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This is Igcse Model Questions Vol1 2023 Chemistry Question 16. It is one of the objective questions from the 2023 Igcse Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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